With Fuka (and all sencha) I don't like the leaves moved around too much at all. I use the slowest pour possible and keep the leaves as still as possible. If a swirl is needed to unblock things then I do, but the tea never taste as good if I have to. For me it seems bashing the leaves around in any way shape or form makes the tea not taste as nice......that's not to say its bad its just not as good as when there's been minimal movement to the leaves.

... I have noticed that I have been giving the kyusu a very gentle swirl when brewing all sencha. I think I started doing this when I saw a Japanese woman who is also a vendor Japanese teas do this ... and she brewed really magnificent sencha.